[2.10] galaxy: Update example for git+file (#73115)

Use correct syntax for installation of role from local git repository. Fixes: #72217

Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>
(cherry picked from commit 776274143f)

docs/docsite/rst/galaxy/user_guide.rst

@@ -270,8 +270,8 @@ Use the following example as a guide for specifying roles in *requirements.yml*:
     # from galaxy
     - name: yatesr.timezone
 
-    # from locally cloned git repository (file:// requires full paths)
-    - src: file:///home/bennojoy/nginx
+    # from locally cloned git repository (git+file:// requires full paths)
+    - src: git+file:///home/bennojoy/nginx
 
     # from GitHub
     - src: https://github.com/bennojoy/nginx